I purchased the 55” cover based on the measurements of my grill and it fits perfectly. If you’re considering this cover, I strongly recommend that you measure your grill before ordering. I’m very pleased with the quality and construction of this cover. It has a form fitting construction that covers the grill lid which then tapers into the portion that covers the side burners. Because of the contoured fitted form, the cover has a definite front side and back side and can only be put on one way in order to fit over the grill lid properly. The cover also includes Velcro side straps to keep it secure on those blustery days. So far it has kept my grill dry through the recent snow and rain.